Answer:
Difference: ¨c-d¨ variable: ¨a¨ coefficient: ¨9¨
Step-by-step explanation:
Just trust me bro
Let side be "a" cm. So another side is (30-2a)/2=15-a
S=ab=a(15-a)=15a-a^2 - parabola
maximum when a = -15/-2=7.5 cm
When a=7.5 all sides are 7.5 cm
So it's a square. S=a*a=7.5*7.5=56.25 cm^2 - max
There is no global minimun for S.(look at the graphic)
Answer:

Step-by-step explanation:
Let total number of students
Students went to the book fair:
Students went to book fair
Students who bought book:

Hence
of total students bought at least one book.
Answer:
Definitions, postulates, and theorems.
Step-by-step explanation:
- Definition: This is a statement that describe the meanings of the terms being used.
- Postulate: This is a statement that is assumed true without proof. It is a statement that is taken to be "clearly true".
- Theorem: This is a statement that is never assumed to be true until it is proven so. It depends strongly on proofs.
Answer:
figure it out
Step-by-step explanation:
yeeeeet